Showing posts with label Antimicrobial Resistance. Show all posts
Showing posts with label Antimicrobial Resistance. Show all posts

Wednesday, April 29, 2015

WHO: Survey & Analysis On Global Response To Antimicrobial Resistance

image

 

# 9990

 

In early 2012 World Health Director-General Margaret Chan expressed a dire warning about our dwindling antibiotic arsenal (see Chan: World Faces A `Post-Antibiotic Era’) – a sentiment echoed a year later by CDC Director Dr. Thomas Frieden during the release of a major US report on the threat (see McKenna On CDC Antibiotic Resistance Report).

 

Inevitable conclusions backed up by a long list studies showing the inexorable erosion of our current cache of antibiotics.   Some of these reports I’ve covered in the past include:

 

EID Journal: Acquisition of Drug Resistant Genes Through International Travel

The Lancet: Antibiotic Resistance - The Need For Global Solutions

UK CMO: Antimicrobial Resistance Poses `Catastrophic Threat’

MMWR Vital Signs: Carbapenem-Resistant Enterobacteriaceae (CRE)

 

Despite decades of warnings, better stewardship of our dwindling antibiotic resources has been slow in coming, even as the number of resistant bacteria continue to grow. 

 

In many countries antibiotics are still available freely (and cheaply) over the counter, public awareness of the risks is low, and surveillance for resistant infections is either low, or non-existent.

 

Today the World Health Organization released a report, that – while finding some glimmers of hope - nonetheless paints a picture of an international community that is either not really engaged, or lacks the resources, to effectively fight antibiotic resistance.

 

Of 194 member nations, nearly 1/3rd (n=61) did not respond to this two-year survey conducted by the WHO, leaving huge gaps in the data.  Participation was highest in the South East Asian Region (100%) and lowest in the Africa Region (17%). 

 

image

 

Results from individual countries are not published, instead combined data is presented for each of the six WHO regions.  First links to the full report and the executive summary, followed by some excerpts from the press release.

 

Publication details

Number of pages: 42
Publication date: 29 April 2015
Languages: English
ISBN: 978 92 4 156494 6
WHO reference number: WHO/HSE/PED/AIP/2015.1

Downloads

 

WHO report finds systems to combat antibiotic resistance lacking in all regions of the world

29 April 2015 Ç€ GENEVA – A quarter of countries that responded to a World Health Organization (WHO) survey have national plans to preserve antimicrobial medicines like antibiotics, but many more countries must also step up. A new report, Worldwide country situation analysis: Response to antimicrobial resistance, which outlines the survey findings, reveals that while much activity is underway and many governments are committed to addressing the problem, there are major gaps in actions needed across all six WHO regions to prevent the misuse of antibiotics and reduce spread of antimicrobial resistance.


“This is the single greatest challenge in infectious diseases today,” says Dr Keiji Fukuda, WHO’s Assistant Director-General for Health Security. “All types of microbes—including many viruses and parasites—are becoming resistant to medicines. Of particularly urgent concern is the development of bacteria that are progressively less treatable by available antibiotics. This is happening in all parts of the world, so all countries must do their part to tackle this global threat.”


Issued a year after WHO’s first report on the extent of antimicrobial resistance globally, which warned of a ‘post-antibiotic era’, this survey—which was completed by 133 countries in 2013 and 2014—is the first to capture governments’ own assessments of their response to resistance to antimicrobial medicines used to treat conditions such as bloodstream infections, pneumonia, tuberculosis (TB), malaria and HIV. It summarizes current practices and structures aimed to address the issue, and shows there are significant areas for improvement.


“While there is a lot to be encouraged by, much more work needs to be done to combat one of the most serious global health threats of our time,” says Dr Fukuda. “Scientists, medical practitioners and other authorities including WHO have been sounding the warning of the potentially catastrophic impact of ignoring antibiotic resistance. Today, we welcome what has been achieved so far, but much more needs to be done to avoid losing the ability to practise medicine and treat both common and serious illnesses.”

Key findings of the report include:

  • Few countries (34 out of 133 participating in the survey) have a comprehensive national plan to fight resistance to antibiotics and other antimicrobial medicines.
  • Monitoring is key for controlling antibiotic resistance, but it is infrequent. In many countries, poor laboratory capacity, infrastructure and data management are preventing effective surveillance, which can reveal patterns of resistance and identify trends and outbreaks.
  • Sales of antibiotics and other antimicrobial medicines without prescription remain widespread, with many countries lacking standard treatment guidelines, increasing the potential for overuse of antimicrobial medicines by the public and medical professionals.
  • Public awareness of the issue is low in all regions, with many people still believing that antibiotics are effective against viral infections.
  • Lack of programmes to prevent and control hospital-acquired infections remains a major problem.

(Continue . . . )

 

While we worry about the sudden emergence of a novel  pathogen that could sweep across the globe killing millions, we already have a slow rolling pandemic of antibiotic resistance, which is only growing more dire by the year. 

 

The WHO’s updated factsheet on Antibiotic resistance shows just some of these impacts.

 

Antimicrobial resistance

Fact sheet N°194
Updated April 2015

Key facts
  • Antimicrobial resistance threatens the effective prevention and treatment of an ever-increasing range of infections caused by bacteria, parasites, viruses and fungi.
  • It is an increasingly serious threat to global public health that requires action across all government sectors and society.
  • Antimicrobial resistance is present in all parts of the world. New resistance mechanisms emerge and spread globally.
  • In 2012, WHO reported a gradual increase in resistance to HIV drugs, albeit not reaching critical levels. Since then, further increases in resistance to first-line treatment drugs were reported, which might require using more expensive drugs in the near future.
  • In 2013, there were about 480 000 new cases of multidrug-resistant tuberculosis (MDR-TB). Extensively drug-resistant tuberculosis (XDR-TB) has been identified in 100 countries. MDR-TB requires treatment courses that are much longer and less effective than those for non-resistant TB.
  • In parts of the Greater Mekong subregion, resistance to the best available treatment for falciparum malaria, artemisinin-based combination therapies (ACTs), has been detected. Spread or emergence of multidrug resistance, including resistance to ACTs, in other regions could jeopardize important recent gains in control of the disease.
  • There are high proportions of antibiotic resistance in bacteria that cause common infections (e.g. urinary tract infections, pneumonia, bloodstream infections) in all regions of the world. A high percentage of hospital-acquired infections are caused by highly resistant bacteria such as methicillin-resistant Staphylococcus aureus (MRSA) or multidrug-resistant Gram-negative bacteria.
  • Treatment failures due to resistance to treatments of last resort for gonorrhoea (third-generation cephalosporins) have been reported from 10 countries. Gonorrhoea may soon become untreatable as no vaccines or new drugs are in development.
  • Patients with infections caused by drug-resistant bacteria are generally at increased risk of worse clinical outcomes and death, and consume more health-care resources than patients infected with the same bacteria that are not resistant.

(Continue . . .)

 

All of which means it is hard to overstate the seriousness of the problem, or the consequences to humanity should we fail to adequately address it.  

 

Sunday, March 23, 2014

India: MSF Calls For `Rational’ Antibiotic Use In Treating TB

image

MSF Briefing Report

 

# 8395

 

Tomorrow (March 24th) is World TB Day, and the focus this year is on multidrug-resistant tuberculosis (MDR TB) (see ECDC/WHO: World TB Day - Focus On MDR & XDR Treatment Outcomes), a growing concern around the world, but no more so than in India where more than 25% of all new TB cases reported in 2012 are to be found.

 

On Friday, Médecins Sans Frontières (MSF) released a sharply worded statement admonishing the Indian government for failing to regulate the sale and use of antibiotics for the treatment of Tuberculosis.

 

They warned that the inappropriate prescribing of antibiotics risks fueling the expansion of drug-resistant TB in that nation. The following excerpts come from a press release from MSF.

 

Patients in India suffer the consequences of poor regulation of TB drugs

March 21, 2014

The Ministry of Health must act to stop drug resistance from spiralling

New Delhi/Mumbai, March 21, 2014: Immediate action from the Indian government is needed to prevent the unregulated sale and inappropriate prescription of tuberculosis (TB) drugs in the private healthcare sector, a practice that has had a significant role in the emergence of drug-resistant TB in the country, warned the international medical humanitarian organisation Doctors Without Borders/Médecins Sans Frontières (MSF) in a statement released today in advance of World TB Day.

“It is the patients who suffer the consequences of poor regulation of TB drug formulations in India. An increasing number of our patients are being diagnosed with drug resistant TB (DR-TB). We encounter a spectrum of resistance patterns which range from mono-drug-resistant TB all the way through to extensively drug-resistant TB (XDR-TB),” said Dr Simon Janes, medical coordinator with MSF in India. “This makes it even more difficult for treatment providers like MSF and the government’s TB Control Programme to accurately diagnose and treat the different forms of drug-resistant tuberculosis.”

Read the briefing report

DR-TB infections are on the rise in India. The rising incidence has made the disease more difficult and considerably more expensive to treat. The conditions for emergence of drug resistance are increasingly being linked to poor drug regulation in India.

India has the largest private TB drug market, with rampant proliferation of first-line TB drugs in a wide variety of dosages and combinations.

Lack of oversight from the drug regulatory authority - the Drug Controller General of India (DCGI) - has made even basic treatment of drug-sensitive TB difficult to monitor. In the face of so many different formulations available in pharmacies across the country, ensuring the correct prescription of first-line TB drugs in the private sector is almost an impossible task for the Central TB Division (CTD).

As a result, poor compliance to World Health Organization (WHO) treatment guidelines is common among private doctors. TB patients being treated by private doctors in India might be facing a grave risk of developing drug-resistant TB due to irrational prescribing practices or indiscriminate use of non-WHO-recommended drug regimens.

“In our experience of working in India since 1999, we have seen prescriptions from private health providers that were completely inappropriate. For example we have seen many prescriptions that prescribe three out of the four first-line TB drugs in combination with a quinalone (antibiotic)”, said Dr Homa Mansoor, the TB Medical Referent for MSF India. “The alarm on drug resistance has been sounded, and the Health Ministry must act now to address this public health crisis."

(Continue . . . )

 


This coming week will no doubt bring many more reports on the challenges, and the progress being made, in the battle against TB.  For more on World Tuberculosis Day, the WHO has released the following brochure:

Reach the 3 million: Find. Treat. Cure TB

Authors:
WHO. Stop TB Partnership. The Global Fund to Fight AIDS, TB and Malaria

Publication details

Number of pages: 17
Publication date: March 2014
Languages: English

Downloads

 

While currently the biggest antibiotic-resistance crisis in India, TB is far from being the only concern.

 

Three and a half years ago The Lancet published a study (see NDM-1: A New Acronym To Memorize)  by Walsh, Toleman, Livermore, et al. that sounded the alarm on the emergence and growing prevalence of the NDM-1 enzyme on the Indian sub-continent.

 

Of particular concern, this NDM enzyme is carried by a plasmid – a snippet of portable DNA  - that can be easily transferred to other types of bacteria (see Study: Adaptation Of Plasmids To New Bacterial Species).

 

Six months after the first Lancet article - in April, 2011 - the same researchers published another study that found the NDM-1 enzyme in 4% of New Delhi’s sampled drinking water sources, and 30 per cent of the sewage tested. Most alarmingly, the researchers also identified 11 new species of bacteria carrying the NDM-1 gene, including strains which cause cholera and dysentery.

 

The rise of antibiotic resistance - including these emerging NDM enzymes - has long been linked to the overuse and misuse of antibiotics. A practice that is still widespread in many parts of the world, but has been particularly rampant on the Indian sub-continent.

 

After years of delay and debate, India this month finally placed restrictions on the sale of antibiotics without a prescription (see Times of India report 46 drugs under strict prescription norm), although pharmacists are already chaffing under the rules (see Pharmacists oppose sales record rule), and it remains to be seen just how effective these new rules will end up being.

 

Short of seeing an extremely high mortality influenza pandemic, it is hard to envision a looming medical crisis more dire than the growing threat of antimicrobial resistance. The World Health Organization, the ECDC, and the CDC all consider the spread of antibiotic resistant organisms to be a major public health concern.

 

For a more complete look at the complex issues of antibiotic resistance, and the dearth of new drugs on the horizon, I can think of no resource better than Maryn McKenna’s superb book (and recent winner of the 2013 June Roth Memorial Book Award, American Society of Journalists and Authors)  Superbug: The Fatal Menace of MRSA.

Superbug (MRSA) Book

And while I dabble in the issues of antibiotic resistance, undoubtedly the best coverage can be found on Maryn’s Superbug blog.

Wednesday, March 05, 2014

CDC: Improving Antibiotic Prescribing Practices In Hospitals

image

 

# 8349

 

 

On Monday, in CDC Telebriefing (March 4th): Improving Antibiotic Prescribing Practices, I wrote about an upcoming CDC Vital Signs  report and web conference on the (often excessive) prescribing of antibiotics in US Hospitals. 

 

This morning we’ve the audio and transcript from that teleconference, excerpts and links to the MMWR early release, plus detailed reports from author and blogger Maryn McKenna and Lisa Schnirring at CIDRAP News.

 

First stop, the Teleconference contents, including links to the audio and transcript.

 

CDC Telebriefing: New Vital Signs Report - Are Prescribing Practices Putting Hospital Patients at Risk?

Poor antibiotic-prescribing practices in hospitals can needlessly put patients at risk for Clostridium difficile infection (deadly diarrhea) and future drug-resistant infections. This month, the CDC Vital Signs report looks at prescribing practices and variations, and calls on all U.S. hospitals to improve antibiotic-prescribing practices. More »

Transcript | AudioAudio/Video file

 

Accompanying this teleconference we have the following MMWR Early Release illustrating the wide disparity in prescribing practices across the nation.

 

Vital Signs: Improving Antibiotic Use Among Hospitalized Patients

Early Release

March 4, 2014 / 63(Early Release);1-7

Scott Fridkin, MD1, James Baggs, PhD1, Ryan Fagan, MD1, Shelley Magill, MD, PhD1, Lori A. Pollack, MD1, Paul Malpiedi, MPH1, Rachel Slayton, PhD1, Karim Khader, PhD2 Michael A. Rubin, MD, PhD2, Makoto Jones, MD1, Matthew H. Samore, MD2, Ghinwa Dumyati, MD3, Elizabeth Dodds-Ashley, PharmD3, James Meek, MPH4, Kimberly Yousey-Hindes, MPH4, John Jernigan, MD1, Nadine Shehab, PharmD1, Rosa Herrera1, L. Clifford McDonald, MD1, Amy Schneider, MPH1, Arjun Srinivasan, MD1 (Author affiliations at end of text)

Background: Antibiotics are essential to effectively treat many hospitalized patients. However, when antibiotics are prescribed incorrectly, they offer little benefit to patients and potentially expose them to risks for complications, including Clostridium difficile infection (CDI) and antibiotic-resistant infections. Information is needed on the frequency of incorrect prescribing in hospitals and how improved prescribing will benefit patients.

Methods: A national administrative database (MarketScan Hospital Drug Database) and CDC's Emerging Infections Program (EIP) data were analyzed to assess the potential for improvement of inpatient antibiotic prescribing. Variability in days of therapy for selected antibiotics reported to the National Healthcare Safety Network (NHSN) antimicrobial use option was computed. The impact of reducing inpatient antibiotic exposure on incidence of CDI was modeled using data from two U.S. hospitals.

Results: In 2010, 55.7% of patients discharged from 323 hospitals received antibiotics during their hospitalization. EIP reviewed patients' records from 183 hospitals to describe inpatient antibiotic use; antibiotic prescribing potentially could be improved in 37.2% of the most common prescription scenarios reviewed. There were threefold differences in usage rates among 26 medical/surgical wards reporting to NHSN. Models estimate that the total direct and indirect effects from a 30% reduction in use of broad-spectrum antibiotics will result in a 26% reduction in CDI.

Conclusions: Antibiotic prescribing for inpatients is common, and there is ample opportunity to improve use and patient safety by reducing incorrect antibiotic prescribing.

Implications for Public Health: Hospital administrators and health-care providers can reduce potential harm and risk for antibiotic resistance by implementing formal programs to improve antibiotic prescribing in hospitals.

 


Our next stop is Maryn Mckenna’s Superbug Blog, where Maryn looks at both the issues of appropriate antibiotic stewardship, and a proposed budget increase for the HHS to monitor help control the growing problem of antibiotic resistance.

 

CDC: Some Hospitals Need Assistance Using Antibiotics Properly (And the New Federal Budget May Help)

Double-barreled news today from the US Centers for Disease Control and Prevention. In an analysis of several sets of hospital data, gathered by the agency and also purchased from independent databases, the CDC said it found that more than 37 percent of prescriptions written in hospitals involved some sort of error or poor practice, increasing the risk of serious infections or antibiotic resistance. And in a surprise announcement timed to the release of the federal draft budget, the agency said it is in line to receive $30 million to enhance its work combating antibiotic resistance in the US.

(Continue . . . )

 

Our last stop is CIDRAP News where Lisa Schnirring provides an excellent summation of yesterday’s reports.

 

 

CDC calls out antibiotic prescribing problems

Lisa Schnirring | Staff Writer | CIDRAP News

Mar 04, 2014

In a major report today that looked at antibiotic usage, the US Centers for Disease Control and Prevention (CDC) said some clinicians in similar hospital units prescribe triple the amounts, with some making the types of errors that fuel drug-resistance problems that put many more patients at risk.

On a more hopeful note, however, the same report also found hospitals that trim their antibiotic use by 30% can reduce Clostridium difficile (C diff) infections, a potentially deadly diarrheal infection known to sicken patients in health facilities, by 25%. The CDC published the findings today in Morbidity and Mortality Weekly Report (MMWR).

(Continue . . . )

Monday, March 03, 2014

CDC Telebriefing (March 4th): Improving Antibiotic Prescribing Practices

image

 


# 8342

 

For years we’ve heard dire warnings of a future where most of our most important antibiotics are rendered impotent against drug resistant infections, and increasingly, those predictions are coming true.  Last September the CDC issued a major threat report called Antibiotic resistance threats in the United States, 2013 that provided  a snapshot of the effects of growing antibiotic resistance across the United States.

 

Among their (conservative) findings:

 

Each year in the United States, at least 2 million people become infected with bacteria that are resistant to antibiotics and at least 23,000 people die each year as a direct result of these infections. Many more people die from other conditions that were complicated by an antibiotic-resistant infection.

 

The rise of antibiotic resistance has long been linked to the overuse and misuse of antibiotics. A problem that is wide spread in many parts of the world where antibiotics are not well regulated, but also right here in the United States, where there remains a great variance in prescribing practices among physicians.

 

Last November, in AAP/CDC: New Guidance On For Antibiotics For Children, we saw guidelines issued – in part – due to the geographic disparity in the amount of antibiotics being prescribed across this country, with doctors some regions much quicker write ABx scripts than doctors in other areas (see map below).

image

 

Tp address this growing problem, tomorrow (March 4th) the CDC will hold a Telebriefing on Antibiotic prescribing practices (details below).

 

CDC Telebriefing: New Vital Signs Report - Are Prescribing Practices Putting Hospital Patients at Risk?

What

Poor antibiotic-prescribing practices in hospitals can needlessly put patients at risk for Clostridium difficile infection (deadly diarrhea) and future drug-resistant infections. This month, the CDC Vital Signs report looks at prescribing practices and variations, and calls on all U.S. hospitals to improve antibiotic-prescribing practices.

Who

Tom Frieden, M.D., M.P.H., Director, Centers for Disease Control and Prevention
John R. Combes, M.D., Senior Vice President, American Hospital Association

When

Tuesday, March 4 at Noon ET   (Content embargoed until 1pm ET)

DIAL-IN:

Media: 888-795-0855
Non-Media: 800-369-1605
International: 1-630-395-0331
PASSCODE: CDC MEDIA

Important Instructions: If you would like to ask a question during the call, press *1 on your touchtone phone. Press *2 to withdraw your question. You may queue up at any time. You will hear a tone to indicate your question is pending.

TRANSCRIPT
A transcript of this media availability will be available following the briefing at CDC’s web site:
www.cdc.gov/media.

###

 

For more on the importance of proper antibiotic stewardship, you may wish to revisit these earlier blogs.

Chan: World Faces A `Post-Antibiotic Era’

Get Smart About Antibiotics Week

IDSA: Educational Guidelines Lower Antibiotic Use

And for a far more complete discussion of antimicrobial resistance issues, I can think of no better primer than Maryn McKenna’s book SUPERBUG: The Fatal Menace of MRSA.

Superbug (MRSA) Book

Superbug (MRSA) Book

Meanwhile, Maryn’s SUPERBUG Blog, continues to provide the best day-to-day coverage of these issues.

Monday, December 16, 2013

Study: NDM-1 Bacteria Survive & Thrive In Two Chinese Wastewater Treatment Plants

image

Photo Credit USGS – Wastewater: The Primary Treatment Process

1. Screening 2. Pumping 3. Aerating 4. Removing sludge 5. Removing Scum 6. killing bacteria

 

# 8079

 

It’s been just over 3 years since The Lancet published a study (see NDM-1: A New Acronym To Memorize)  by Walsh, Toleman, Livermore, et al. that awakened the world to the emergence and growing prevalence of the NDM-1 (New Delhi metallo-β-lactamase) enzyme that can make many types of bacteria resistant to a wide spectrum of antibiotics.

 

This enzyme is carried by a plasmid – a snippet of portable DNA  - that can be transferred to other types of bacteria (see Study: Adaptation Of Plasmids To New Bacterial Species).

 

Over the past few years we have seen a worrisome expansion of β-lactamase enzymes in bacteria, and they are slowly eroding the value of much of our antibiotic arsenal. Those that inhibit the antimicrobial actions of the Carbapenem class of antibiotics – called carbapenemases – are of particular concern. Carbapenems are often used as the drug of last resort for treating difficult bacterial infections, including Escherichia coli (E. coli) and Klebsiella pneumoniae.

Six months after the first Lancet article - in April, 2011 - the same researchers published another study that found the NDM-1 enzyme in 4% of New Delhi’s sampled drinking water sources, and 30 per cent of the sewage tested. Most alarmingly, the researchers also identified 11 new species of bacteria carrying the NDM-1 gene, including strains which cause cholera and dysentery.

 

The Lancet Infectious Diseases, Early Online Publication, 7 April 2011

doi:10.1016/S1473-3099(11)70059-7

Dissemination of NDM-1 positive bacteria in the New Delhi environment and its implications for human health: an environmental point prevalence study

Prof Timothy R Walsh PhD , Janis Weeks BS, David M Livermore PhD , Mark A Toleman PhD

 

Last year, in Study: MRSA In Waste Water Treatment Plants  (WWTPs) we learned that MRSA (methicillin-resistant Staphylococcus aureus) can survive the waste water treatment process, and potentially could end up redistributed via reclaimed irrigation water.


Today, we’ve a new study conducted by scientists from Rice, Nankai and Tianjin universities that found NDM-1 bacteria not only survived processing in two Chinese WWTPs, they actually were found to multiply in that environment.


First a link to the study which appears in Environmental Science & Technology , then some excerpts from a press release from Rice University.

 

Proliferation of Multidrug-Resistant New Delhi Metallo-β-lactamase Genes in Municipal Wastewater Treatment Plants in Northern China

Yi Luo †, Fengxia Yang †‡, Jacques Mathieu §, Daqing Mao *‡, Qing Wang †, and P. J. J. Alvarez *§

ABSTRACT

The New Delhi metallo-β-lactamase (NDM-1) increases bacterial resistance to a broad range of antibiotics, and bacteria that produce it can cause infections that are very difficult to treat, thus posing great risks to human health. This paper addresses the occurrence of NDM-1 genes through different processes in wastewater treatment plants (WWTPs). NDM-1 genes prevailed through several treatment units (including disinfection by chlorination) in two WWTPs in northern China. Significant NDM-1 gene levels were present in the effluent discharged from both WWTPs (from 1316 ± 232 to 1431 ± 247 copies/mL, representing from 4.4 to 93.2%, respectively, of influent levels). NDM-1 genes were present at much higher concentrations in dewatered waste sludge that is applied to soils [(4.06 ± 0.98) × 107 to (6.21 ± 2.23) × 107 copies/g of dry weight], raising the possibility of propagation to indigenous bacteria. This concern was validated by a conjugation experiment with Haihe River sediment not harboring NDM-1 genes at detectable levels, where an NDM-1-positive Achromobacter sp. isolated from a WWTP transferred the NDM-1 gene to an indigenous Comamonas sp. The discharge of NDM-1 genes in the effluent and dewatered waste sludge from WWTPs (even at rates higher than influent values) underscores the need to better understand and mitigate their proliferation and propagation from WWTPs.

(Continue . . .)

 


The entire PDF is available at the link above.  Here are a few excerpts from the press release,after which I’ll be back with a little more:

 

Superbugs’ found breeding in sewage plants

Mike Williams

December 16, 2013Posted in: News Releases

 

‘Superbugs’ found breeding in sewage plants

Rice U. study: Two wastewater treatment plants in China fail to kill antibiotic-resistant bacteria 

HOUSTON – (Dec. 16, 2013) – Tests at two wastewater treatment plants in northern China revealed antibiotic-resistant bacteria were not only escaping purification but also breeding and spreading their dangerous cargo.

 

Joint research by scientists from Rice, Nankai and Tianjin universities found “superbugs” carrying New Delhi Metallo-beta-lactamase (NDM-1), a multidrug-resistant gene first identified in India in 2010, in wastewater disinfected by chlorination. They found significant levels of NDM-1 in the effluent released to the environment and even higher levels in dewatered sludge applied to soils.

 

The study, led by Rice University environmental engineer Pedro Alvarez, appeared this month in the American Chemical Society journal Environmental Science and Technology Letters.

 

“It’s scary,” Alvarez said. “There’s no antibiotic that can kill them. We only realized they exist just a little while ago when a Swedish man got infected in India, in New Delhi. Now, people are beginning to realize that more and more tourists trying to go to the upper waters of the Ganges River are getting these infections that cannot be treated.

 

“We often think about sewage treatment plants as a way to protect us, to get rid of all of these disease-causing constituents in wastewater. But it turns out these microbes are growing. They’re eating sewage, so they proliferate. In one wastewater treatment plant, we had four to five of these superbugs coming out for every one that came in.”

(Continue . . . )

Concerns over WWTPs extend even beyond resistant bacteria, as they are also called upon to deal with drugs and chemicals either dumped into the system, or excreted from humans in their waste.  In recent years we’ve seen a number of reports on detectable levels of drugs in rivers and streams that passed relatively intact through treatment facilities.

 

More than six  years ago, the subject of what happens to Tamiflu once it is excreted by the human body first graced these pages.The blog was called The Law of Unintended Consequences, and it looked a study conducted at the Centre for Ecology and Hydrology in Oxford, England.

 

Their findings were released in the January 2007 issue of Environmental Health Perspectives (EHP) in a report entitled, Potential Risks Associated with the Proposed Widespread Use of Tamiflu, that illustrated what might happen if millions of people simultaneously began taking Tamiflu and releasing it into our environment.

 

The upshot of the the study was that scientists believed enough of the metabolite OC (oseltamivir carboxylate) would be present in some rivers and streams, after sewage plant processing, to present a genuine risk to the environment.

 

The concern being that enough Tamiflu might persist after wastewater treatment and release to rivers and streams that it might speed the development of resistant influenza viruses in waterfowl.

 

Fast forward to October of 2009 and we saw another report (see Everything Old Is News Again), based on studies done the previous year in Kyoto, Japan – that showed elevated levels of the OC Metabolite in wastewater discharge.

 

More recently, investigators looking at the levels chemicals in rivers downstream from a pharmaceutical manufacturing hub in India, found staggering amounts of antibiotics along with signs of resistant bacteria.

 

That story was  well covered by Maryn McKenna on her Superbug Blog (see Drug residues and drug resistance in water: Not good).

 

Since  Wastewater Treatment Plants depend upon microbial activity in order to breakdown or `digest’ sewage, large quantities of antibiotics in the sewage could inhibit microbial activity, resulting in the failure of WWTPs and the discharge of under-treated wastewater into the environment. 

 

While I’m sure most of us would like to simply `flush and forget it’, the truth is wastewater infrastructures around the world are continually called upon to deal with new, and sometimes difficult challenges, and in many places the technology simply isn’t currently up to the task. 

 

Another good reason to dispose of prescription drugs properly, and not just flush them down the drain.

Monday, November 18, 2013

Surviving Winter’s Ills Without Abusing Antibiotics

image

Credit CDC, FDA, HHS

 

 

# 7987

 

As mentioned yesterday (see The Lancet: Antibiotic Resistance - The Need For Global Solutions), today marks European Antibiotic Awareness day and kicks off the CDC’s Get Smart About Antibiotics Week.  With each year that passes, more and more bacterial strains are finding ways to evade our dwindling arsenal of antibiotics – and so public health officials are working hard to improve the stewardship of the ones that still remain effective.

 

To that end, this week agencies like the World Health Organization, the CDC, and the ECDC are working to educate the public on when antibiotics are appropriate treatments, and when they are not.  Since most winter respiratory illnesses are viral in nature, antibiotics simply don’t work – and using them inappropriately can lead to increased resistance.

 

So today, a quick tour of (and some excerpts from) the messaging coming from these organizations.

 

From the World Health Organization we get European Antibiotic Awareness Day 2013: everyone is responsible.

18-11-2013

Antibiotic resistance affects the entire WHO European Region, driven by the overuse, underuse and misuse of antibiotics. Although some efforts have been made to combat indiscriminate use, many countries have no national regulation or enforcement on antibiotic usage; healthy animals are given antibiotics to promote growth or prevent disease, and commercial companies promote antibiotics irresponsibly. In too many countries, members of the general public can buy antibiotics over the counter (without a prescription) and use them at will. Doctors often prescribe antibiotics easily or inappropriately, and people take them to treat viral infections such as influenza and the common cold, against which they do not work.

(Continue . . .)

 

While today Public Health England is in myth busting mode, explaining that:

 

Green phlegm and snot ‘not always a sign of an infection needing antibiotics

Advice on European Antibiotics Awareness Day (18 November) to raise awareness of the risks of inappropriate use of antibiotics.

Having green phlegm or snot is not always a sign of a bacterial infection that will require antibiotics to get better, says Public Health England (PHE) and the Royal College of General Practitioners (RCGP).

 

This advice is issued on European Antibiotics Awareness Day (18 November) which aims to raise awareness of the risks associated with the inappropriate use of antibiotics and how to use them responsibly.

Research by PHE’s Primary Care Unit has found that 40% of the general public believed that antibiotics would help a cough with green phlegm get better more quickly rather than clear phlegm (6%).

 

White blood cells are produced by the body to attack any foreign materials the body does not recognise such as pollutants, dirt, pollen or microbes, and are carried in your phlegm and snot. Some white blood cells contain a green substance (a protein) so if more of these cells are present the greener your phlegm or snot will be.

 

Phlegm therefore comes in a range of colours from white to mustard-yellow to varying shades of green. Coloured phlegm or snot does not mean you need antibiotics.

 

In most healthy people, phlegm or snot production with or without a cough will stop as your cold or flu-like illness clears up, although it may take up to 3 to 4 weeks.

 

And from the CDC, some advice on how to deal with the miseries of a winter illness without resorting to antibiotics.

 

How to Feel Better

What can I do to feel better if antibiotics won’t treat my illness because it’s caused by a virus?
For upper respiratory infections, such as sore throats, ear infections, sinus infections, colds, and bronchitis, try the following:

  • Get plenty of rest
  • Drink plenty of fluids
  • Use a clean humidifierExternal Web Site Icon or cool mist vaporizer
  • Avoid smoking, second-hand smoke, and other pollutants (airborne chemicals or irritants)
  • Take acetaminophen, ibuprofen or naproxen to relieve pain or fever (read about what is safe to give your child)

For children and adults, over-the-counter pain relievers, decongestants and saline nasal sprays may help relieve some symptoms. Remember, always use over-the-counter products as directed. Many over-the-counter products are not recommended for children younger than certain ages.

Over-the-counter medicines may help relieve symptoms such as runny nose, congestion, fever and aches, but they do not shorten the length of time you or your child is sick.

Learn more by reading below about over-the-counter medicines. Here are some helpful tips for how to feel better depending on how you or your child feels.

Sore Throat
  • Soothe a sore throat with ice chips, sore throat spray, or lozenges (do not give lozenges to young children)
  • Use a clean humidifier or cool mist vaporizer
  • Take acetaminophen, ibuprofen or naproxen to relieve pain or fever (read about what is safe to give your child)
Ear Pain
  • Put a warm moist cloth over the ear that hurts
  • Take acetaminophen, ibuprofen or naproxen to relieve pain or fever (read about what is safe to give your child)
Runny Nose
Sinus Pain/Pressure
  • Put a warm compress over the nose and forehead to help relieve sinus pressure
  • Use a decongestant or saline nasal spray
  • Breathe in steam from a bowl of hot water or shower
  • Take acetaminophen, ibuprofen or naproxen to relieve pain or fever (read about what is safe to give your child)
Cough

Over-the-Counter (OTC) Medicines

Questions and Answers for Parents about Over-the-Counter (OTC) Medicines

Related Materials

Sunday, November 17, 2013

The Lancet: Antibiotic Resistance - The Need For Global Solutions

image

Credit CDC Vital Signs

 


# 7985

 


With tomorrow (Nov. 18th) marking Antibiotic Resistance Awareness Day in Europe, and kicking off the Get Smart About Antibiotics week in the United States, today The Lancet has published a special collection of reports and articles on the growing problems of antimicrobial resistance (note: Free registration required to access articles).

 

Antibiotic resistance—the need for global solutions

Published November 17, 2013

Executive summary

The causes of antibiotic resistance are complex and include human behaviour at many levels of society; the consequences affect everybody in the world. Similarities with climate change are evident. Many efforts have been made to describe the many different facets of antibiotic resistance and the interventions needed to meet the challenge. However, coordinated action is largely absent, especially at the political level, both nationally and internationally. Antibiotics paved the way for unprecedented medical and societal developments, and are today indispensible in all health systems. Achievements in modern medicine, such as major surgery, organ transplantation, treatment of preterm babies, and cancer chemotherapy, which we today take for granted, would not be possible without access to effective treatment for bacterial infections. Within just a few years, we might be faced with dire setbacks, medically, socially, and economically, unless real and unprecedented global coordinated actions are immediately taken. This Commission describes the global situation of antibiotic resistance, its major causes and consequences, and identify key areas in which action is urgently needed.

The Lancet Infectious Diseases Commission

Antibiotic resistance—the need for global solutions

Ramanan Laxminarayan, Adriano Duse, Chand Wattal, Anita K M Zaidi, Heiman F L Wertheim, Nithima Sumpradit, Erika Vlieghe, Gabriel Levy Hara, Ian M Gould, Herman Goossens, Christina Greko, Anthony D So, Maryam Bigdeli, Göran Tomson, Will Woodhouse, Eva Ombaka, Arturo Quizhpe Peralta, Farah Naz Qamar, Fatima Mir, Sam Kariuki, Zulfiqar A Bhutta, Anthony Coates, Richard Bergstrom, Gerard D Wright, Eric D Brown, Otto Cars

Related articles and comments in this issue also include:

Antibiotic resistance: global response needed

Simon J Howard, Mike Catchpole, John Watson, Sally C Davies

Global collaboration to encourage prudent antibiotic use

Sarah Earnshaw, Andrea Mendez, Dominique L Monnet, Lauri Hicks, Marilyn Cruickshank, Lynn Weekes, Howard Njoo, Stacie Ross

Antibiotic effectiveness and child survival

Mark Young, Mickey Chopra, Atieno Ojoo

Antibiotic resistance in Ghana

Martha Gyansa-Lutterodt

Light at the end of the tunnel of antibiotic development

Glenn S Tillotson

Antibiotic Action: helping deliver action plans and strategies

Laura JV Piddock

 

Perseverance, persistence, and the Chennai declaration

Abdul Ghafur

Related content published in The Lancet Infectious Diseases

Antibiotic resistance: long-term solutions require action now

 

Despite decades of warnings, the persistent overuse of antibiotics has led us to the precipice, and we now face an uncertain and potentially frightening future where previously curable infections may run rampant.  A few recent warnings include:

 

ECDC: Antibiotic Resistance In the EU – 2012

UK CMO: Antimicrobial Resistance Poses `Catastrophic Threat’

MMWR Vital Signs: Carbapenem-Resistant Enterobacteriaceae (CRE)

CDC HAN Advisory: Increase In CRE Reports In The United States

PNAS: Abundant Antibiotic Resistance Genes In Chinese Swine Farms

Chan: World Faces A `Post-Antibiotic Era’

 

For a more complete look at the complex issues of antibiotic resistance, and the dearth of new drugs on the horizon, I can think of no resource better than Maryn McKenna’s superb book (and recent winner of the 2013 June Roth Memorial Book Award, American Society of Journalists and Authors)  Superbug: The Fatal Menace of MRSA.

Superbug (MRSA) Book

And while I dabble in writing about the issues of antibiotic resistance, undoubtedly the best coverage can be found on Maryn’s Superbug blog.

Tuesday, September 17, 2013

Referral: McKenna On CDC Antibiotic Resistance Report

image


# 7780

 

Yesterday the CDC released a comprehensive report on the threat of growing antibiotic resistance, with Director Thomas Frieden warning, `“If we are not careful, we will soon be in a post-antibiotic era.” – a stark forecast not dissimilar from the one that World Health Director-General Margaret Chan gave a year ago (see Chan: World Faces A `Post-Antibiotic Era’).

 

Bringing all of this together is Flublogia’s favorite `scary disease girl’ - journalist, author, and blogger Maryn McKenna - whose beat regularly revolves around the world of antimicrobial resistance. 

 

Maryn is the author of the award winning book Superbug: The Fatal Menace of MRSA, and is probably responsible for the sale of more hand sanitizer and soap than any other science writer in the business.

 

Maryn posted the first of what is likely to be a series of posts on this CDC report yesterday.   Follow the link to read:

 

CDC Threat Report: ‘We Will Soon Be in a Post-Antibiotic Era’

The U.S. Centers for Disease Control and Prevention has just published a first-of-its-kind assessment of the threat the country faces from antibiotic-resistant organisms, ranking them by the number of illnesses and deaths they cause each year and outlining urgent steps that need to be taken to roll back the trend.

 

The agency’s overall — and, it stressed, conservative — assessment of the problem:

  • Each year, in the U.S., 2,049,442 illnesses caused by bacteria and fungi that are resistant to at least some classes of antibiotics;
  • Each year, out of those illnesses, 23,000 deaths;
  • Because of those illnesses and deaths, $20 billion each year in additional healthcare spending;
  • And beyond the direct healthcare costs, an additional $35 billion lost to society in foregone productivity.

(Continue . . . )

Monday, March 11, 2013

UK CMO: Antimicrobial Resistance Poses `Catastrophic Threat’

image

PDF Link

 

# 6997

 

The growing threat of antibiotic resistance has made a great many headlines over the years, but real progress in halting its spread has been disappointing. 

 

New superbugs, virtually unheard of a decade ago (see MMWR Vital Signs: Carbapenem-Resistant Enterobacteriaceae (CRE) and NDM-1: A Matter Of Import) continue to emerge, and further erode our dwindling antibiotic arsenal.

 

Today, England’s Chief Medical Officer (CMO) Dame Sally Davies released a a comprehensive overview of the dangers posed by growing antibiotic resistance, and issued a stark warning. 

 

The following 3 minute video introduces this new report.

 


This from the UK’s Department of Health.

 

Antimicrobial resistance poses ‘catastrophic threat’, says Chief Medical Officer

March 11, 2013

Global action is needed to tackle the catastrophic threat of antimicrobial resistance, which in 20 years could see any one of us dying following minor surgery, England’s Chief Medical Officer Professor Dame Sally Davies said today.

 

The stark warning comes as the second volume of the Chief Medical Officer’s annual report is published, providing a comprehensive overview of the threat of antimicrobial resistance and infectious diseases.

 

Calling for politicians to treat the threat as seriously as MRSA, the report highlights a “discovery void” with few new antibiotics developed in the past two decades. It highlights that, while a new infectious disease has been discovered nearly every year over the past 30 years, there have been very few new antibiotics developed leaving our armoury nearly empty as diseases evolve and become resistant to existing drugs.

 

In addition to encouraging development of new drugs, the report highlights that looking after the current arsenal of antibiotics is equally important. This means using better hygiene measures to prevent infections, prescribing fewer antibiotics and making sure they are only prescribed when needed.

 

The Chief Medical Officer also states that more action is needed to tackle the next generation of healthcare associated infections, including new strains of pneumonia-causing klebsiella, that will be harder to treat.

 

Some 17 recommendations are made as part of the report, including:

  • A call for antimicrobial resistance to be put on the national risk register and taken seriously by politicians at an international level, including the G8 and World Health Organization;
  • Better surveillance data across the NHS and world wide to monitor the developing situation;
  • More work carried out between the healthcare and pharmaceutical industries to preserve existing drugs and encourage the development of new antibiotics to fill the “discovery void” of the last 20 years; and
  • Building on the success of the NHS in cutting MRSA rates, which have fallen by 80 per cent since a peak in cases in 2003 through better hygiene measures, which should be used when treating the next generation of healthcare associated infections such as new strains of harder-to-treat klebsiella.

(Continue . . .)

 


Dame Sally Davies remarks are not dissimilar from those made nearly a year ago by World Health Organization Director General Margaret Chan, who painted a bleak picture of the future of antibiotic availability in her keynote address to the Conference on Combating Antimicrobial Resistance in Copenhagen, Denmark.

 

The D-G’s entire remarks may be viewed on the WHO’s website at Antimicrobial resistance in the European Union and the world, but I’ve excerpted a few choice statements below, after which you’ll find a link to the World Health Organization’s latest publication on antibiotic resistance.

 

Excerpts from D-G Chan’s March 14th, 2012 speech.

 

Antimicrobial resistance is on the rise in Europe, and elsewhere in the world. We are losing our first-line antimicrobials. Replacement treatments are more costly, more toxic, need much longer durations of treatment, and may require treatment in intensive care units.

<SNIP>

If current trends continue unabated, the future is easy to predict. Some experts say we are moving back to the pre-antibiotic era. No. This will be a post-antibiotic era. In terms of new replacement antibiotics, the pipeline is virtually dry, especially for gram-negative bacteria. The cupboard is nearly bare.

<SNIP>

A post-antibiotic era means, in effect, an end to modern medicine as we know it. Things as common as strep throat or a child’s scratched knee could once again kill.

The evolving threat of antimicrobial resistance - Options for action

Authors:
World Health Organization

 

And for a far more complete discussion of antimicrobial resistance issues, I can think of no better primer than Maryn McKenna’s book SUPERBUG: The Fatal Menace of MRSA. Maryn’s SUPERBUG Blog, continues to provide the best day-to-day coverage of these issues.

Saturday, February 16, 2013

CDC HAN Advisory: Increase In CRE Reports In The United States

HAN

 

 


 

Credit CDC HAN

# 6945

 

Regular readers are aware that - while still fairly rare -reports of patients with CRE (Carbapenem-resistant Enterobacteriaceae) colonization or infection are on the rise in hospitals around the world, and across the nation. 

 

Enterobacteriaceae comprise a large family of Gram-negative bacteria that range from harmless strains to pathogenic invaders, and includes such familiar names as Salmonella, Escherichia coli, Klebsiella and Shigella.

 

Carbapenem-resistant Enterobacteriaceae are varieties that have developed resistance to a class of antibiotics called carbapenems, which are often the drug of last resort for treating difficult bacterial infections.

 

Just last Thursday, in MMWR: Denver Hospital Outbreak Of NDM-Producing CRKP, we looked at one hospital’s response to an outbreak of NDM-Producing CRKP in 2012.

 

Other recent blogs on this growing threat include:

 

ECDC: Multidrug Resistant Infections Increasing In Europe

EID: Environmental NDM-1 Detected In Vietnam

MMWR: NDM-1 Transmission In Rhode Island

Netherlands: Large Nosocomial KPC Outbreak

 

Underscoring the importance of getting control over these rising infections, yesterday the CDC published the following HAN Advisory on the increase of CRE in the United States.

 

This is an official CDC HEALTH ADVISORY

Distributed via the CDC Health Alert Network
February 14, 2013, 12:30 ET
CDCHAN-00341-02-14-2013

New Carbapenem-Resistant Enterobacteriaceae Warrant Additional Action by Healthcare Providers

Summary: Carbapenem-resistant Enterobacteriaceae (CRE) are untreatable or difficult-to-treat multidrug-resistant organisms that are emerging in the United States. Because of increased reports of these multidrug-resistant organisms, CDC is alerting clinicians about the need for additional prevention steps regarding CRE. Key points include:

  • While still uncommon, reports of unusual forms of CRE (e.g., New Delhi Metallo-β-lactamase and Verona Integron-mediated Metallo-β-lactamase) in the United States are increasing. Of the 37 unusual forms of CRE that have been reported in the United States, the last 15 have been reported since July, 2012.
  • This increase highlights the need for U.S. healthcare providers to act aggressively to prevent the emergence and spread of these unusual CRE organisms.
  • Current CDC guidance includes key elements of CRE prevention (e.g., use of Contact Precautions) in healthcare settings.
  • Because the vast majority of these unusual organisms were isolated from patients who received overnight medical treatment outside of the United States, additional measures described in this HAN advisory are now recommended to be taken when such patients are hospitalized in the United States.

Background

Klebsiella species and Escherichia coli are examples of Enterobacteriaceae, a family of bacteria that normally live in water, soil, and the human gut. CRE are Enterobacteriaceae that have developed high levels of resistance to antibiotics, including last-resort antibiotics called carbapenems. CRE infections most commonly occur among patients who are receiving antibiotics and significant medical treatment for other conditions.

 

Although there are a large number of mechanisms that can lead to carbapenem resistance among Enterobacteriaceae, the production of an enzyme that breaks down broad-spectrum carbapenem antibiotics (carbapenemases) has emerged as an important mechanism in the United States over the last decade. Most carbapenemase-producing CRE in the United States produce a carbapenemase called Klebisella pneumoniae carbapenemase, or KPC, which was first reported in 2001 and has been found in many different types of Gram-negative bacteria.

 

KPC-producing Enterobacteriaceae appear to have spread throughout the United States since 2001 but still remain relatively uncommon in most hospitals. Enterobacteriaceae producing other carbapenemases, such as New Delhi Metallo-β-lactamase (NDM) and the Verona Integron-mediated Metallo-β-lactamase (VIM), have been very uncommon in the United States but are more common in other parts of the world. Many countries may not be actively looking for CRE; therefore, it is unclear which countries have experienced unusual carbapenemases (e.g., NDM, VIM) and it is difficult to know their overall incidence at any given time. The vast majority of CRE producing non-KPC carbapenemases reported to CDC were isolated from patients with a history of an overnight stay in a healthcare facility outside the United States.

Recommendations

CDC continues to recommend that facilities follow the CDC guidance for preventing the spread of CRE in healthcare settings (http://www.cdc.gov/hai/organisms/cre/cre-toolkit/index.html). Facilities should:

  • Ensure that the patient is on Contact Precautions.
  • Reinforce and evaluate adherence to hand hygiene and Contact Precautions for healthcare personnel who come into contact with the patient (e.g., enter the patient’s room).
  • Since clinical cultures will identify only a minority of patients with CRE, screen epidemiologically linked patient contacts for CRE colonization with stool, rectal, or perirectal cultures. At a minimum, this should include persons with whom the CRE patient shared a room but could also include patients who were treated by the same healthcare personnel. A laboratory-based screening protocol is available here: (http://www.cdc.gov/HAI/pdfs/labSettings/Klebsiella_or_Ecoli.pdf).
  • Should the patient be transferred to another healthcare facility, ensure that the presence of CRE colonization or infection is communicated to the accepting facility. An example transfer form is available here (http://www.cdc.gov/HAI/toolkits/InterfacilityTransferCommunicationForm11-2010.pdf).
  • Dedicate rooms and staff to CRE patients when possible. It is preferred that staff caring for CRE patients do not also care for non-CRE patients.
  • Remove temporary medical devices as soon as they are no longer needed.

In addition to that guidance, CDC now also recommends the following:

  • When a CRE is identified in a patient (infection or colonization) with a history of an overnight stay in a healthcare facility (within the last 6 months) outside the United States, send the isolate to a reference laboratory for confirmatory susceptibility testing and test to determine the carbapenem resistance mechanism; at a minimum, this should include evaluation for KPC and NDM carbapenemases.
  • For patients admitted to healthcare facilities in the United States after recently being hospitalized (within the last 6 months) in countries outside the United States, consider each of  the following:
    • Perform rectal screening cultures to detect CRE colonization.
    • Place patients on Contact Precautions while awaiting the results of these screening cultures.

Further information about the prevention of CRE transmission is available in CDC’s CRE toolkit (http://www.cdc.gov/hai/organisms/cre/cre-toolkit/index.html).

The Centers for Disease Control and Prevention (CDC) protects people's health and safety by preventing and controlling diseases and injuries; enhances health decisions by providing credible information on critical health issues; and promotes healthy living through strong partnerships with local, national, and international organizations.

 

 

The CDC’s Health Alert Network (HAN) is designed to ensure that communities, agencies, health care professionals, and the general public are able to receive timely information on important public health issues.

 

You can sign up for HAN messages, and scores of other CDC and HHS email notifications, by going to the CDC - Quick Subscribe GovDelivery page

 

The problems of growing antibiotic resistance has no better spokesperson than Maryn McKenna on her excellent Superbug Blog, and in her book Superbug: The Fatal Menace of MRSA.

Both highly recommended.